Mark Harmstone : comctl32: Call OpenThemeData on themed scrollbars.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 050bda2ece4f249d2973c3d4e1a1f5f3671de053
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=050bda2ece4f249d2973c3d4e1a1f5f3671de053

Author: Mark Harmstone <hellas at burntcomma.com>
Date:   Sat Feb 28 16:37:08 2015 +0000

comctl32: Call OpenThemeData on themed scrollbars.

---

 dlls/comctl32/theme_scrollbar.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/dlls/comctl32/theme_scrollbar.c b/dlls/comctl32/theme_scrollbar.c
index 9978598..ed2c051 100644
--- a/dlls/comctl32/theme_scrollbar.c
+++ b/dlls/comctl32/theme_scrollbar.c
@@ -38,7 +38,39 @@ LRESULT CALLBACK THEMING_ScrollbarSubclassProc (HWND hwnd, UINT msg,
                                                 WPARAM wParam, LPARAM lParam,
                                                 ULONG_PTR dwRefData)
 {
+    const WCHAR* themeClass = WC_SCROLLBARW;
+    HTHEME theme;
+    LRESULT result;
+
     TRACE("(%p, 0x%x, %lu, %lu, %lu)\n", hwnd, msg, wParam, lParam, dwRefData);
 
-    return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
+    switch (msg) {
+        case WM_CREATE:
+            result = THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
+            OpenThemeData(hwnd, themeClass);
+            return result;
+
+        case WM_DESTROY:
+            theme = GetWindowTheme(hwnd);
+            CloseThemeData(theme);
+            return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
+
+        case WM_THEMECHANGED:
+            theme = GetWindowTheme(hwnd);
+            CloseThemeData(theme);
+            OpenThemeData(hwnd, themeClass);
+            break;
+
+        case WM_SYSCOLORCHANGE:
+            theme = GetWindowTheme(hwnd);
+            if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
+            /* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
+             * which will do the repaint. */
+            break;
+
+        default:
+            return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
+    }
+
+    return 0;
 }